/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.linkis.monitor.core.pac

import java.util
import java.util.concurrent.LinkedBlockingDeque

class ScanBuffer {
  val buffer: LinkedBlockingDeque[ScannedData] = new LinkedBlockingDeque[ScannedData]

  def write(data: ScannedData): Unit = buffer.add(data)

  def write(data: util.List[ScannedData]): Unit = buffer.addAll(data)

  def drain(maxSize: Int = -1): util.List[ScannedData] = {
    val ret = new util.LinkedList[ScannedData]
    val realSize = if (maxSize < 0) {
      buffer.size
    } else {
      maxSize
    }
    buffer.drainTo(ret, realSize)
    return ret
  }

  def size(): Int = buffer.size()
}
